Nitric Acid → Indium nitrate

Participants

Reaction Steps

Metallic indium of 4N (99.99%) purity was dissolved in hot nitric acid to obtain a solution of indium nitrate. The solution was diluted to have a concentration of In of 100 g/L. Maintaining the solution of indium nitrate at a temperature in the range of 35-40° C., ammonium carbonate as a neutralisation precipitant was added thereto in an amount 1.5 times the equivalent weight to obtain a precipitate, which was separated from the solution and washed by using a filter press, and the precipitate was dried in an air atmosphere at 150° C. for 15 hours, followed by crushing the dried product with a hammer mill.

Provenance & Evidence